1918 



YORKSHIRE TYPE AMMONITES— II CXVIIb 



Fig. 2 



Fig. i 



Ammonites gregarius, Bean-Leckenby, 1859 



Sedgwick Museum, Cambridge (Leckenby Coll.), Syntype 



Fig. 1, Side view ; Fig. 2, Suture-line x 3 



PRORSICERAS GREGARIUM, Bean-Leckenby sp. 



